Malicious PDF — malware analysis report

Static analysis result for SHA-256 64493945fa92ea97…

MALICIOUS

PDF

80.6 KB Created: 2021-03-26 07:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 07b10b3697ee67f86544ac433ba6ee09 SHA-1: 081d549a3ba19dfce45fd09a6fabd3becbb5c36f SHA-256: 64493945fa92ea97fa78ac7a05b6ca1b032d4c5c1ff2eb575b4046a5d971cc84
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/wix?keyword=modeling+chemistry+unit+4+worksheet+4+answers PDF link annotation
    • https://kapiromus.weebly.com/uploads/1/3/5/3/135345701/d9733422cbe35a.pdfIn PDF document text
    • https://fakoronad.weebly.com/uploads/1/3/4/7/134712901/68fc0cb8.pdfIn PDF document text
    • http://garantiya62.ru/dragons_of_autumn_twilight_mapspeds.pdfIn PDF document text
    • http://giocodigital.fun/20782574604srlmt.pdfIn PDF document text
    • https://vofesoxofibebup.weebly.com/uploads/1/3/4/9/134900141/vafefowamilepinagiv.pdfIn PDF document text
    • https://mafakovik.weebly.com/uploads/1/3/5/3/135347242/926956c.pdfIn PDF document text
    • http://livecopyrightverification.com/60188971795v8t99.pdfIn PDF document text
    • https://pedumukelogo.weebly.com/uploads/1/3/0/9/130969284/30b8b45f12c17.pdfIn PDF document text
    • https://bukudemedu.weebly.com/uploads/1/3/1/4/131483547/df74e153650fe.pdfIn PDF document text
    • https://xipakopubax.weebly.com/uploads/1/3/5/9/135966228/zizef.pdfIn PDF document text
    • http://f1l3download.site/anari_film_song_videoy3sv0.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/5068517.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tugumeb/rachmaninoff_prelude_in_g_minor_sheet_music.pdfIn PDF document text
    • https://6c403777-3bdb-430d-a4ca-23d5788374d5.filesusr.com/ugd/e0034b_3871b39206534c2784d2a7dd09c64bdd.pdf?index=trueIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_9625425fcbe74282b0145b67fb02fd2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/bepesipivitafilidifamod.pdfIn PDF document text
    • https://cb71deac-5427-4a11-aec2-6feec017c243.filesusr.com/ugd/4cd983_3214e0bd8409415d93a7a87f8a3a3a11.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_0874c9d59e6b4c3ab4b5c6ad72cb507b.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_10a48e0558b74ec581ec3b4ae84df363.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/48791071744.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/puzesutagetuxema.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 5704 bytes
SHA-256: 55adf1d864effc4ff45beb51a01c9cf5b830017449daa519be01726fac76eb63
font_01_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 14612 bytes
SHA-256: fb5ad396c83e6d9de1718e5fba31fa07345b3a3a3e36a88507378cf6f6df6455